Apparatus for drying the sludge or solid matter recovered from sewage.



A. B. OGDEN.

APPARATUS FOR DRYING THE SLUDGE 0R SOLID MATTER RECOVERED FROM SEWAGE.

APPLICATION FILED .IULYI3, I914.

Ll$5fi Patented Apr. 13, 1915.

2 SHEETSSHEET 1.

8' c i 5 q ATTV THE NORRIS PETERS 50.. PHOTO-LITHO.. WASHINGTON, D. cv

A.,B. OGDEN.

APPARATUS FOR DRYING THE SLUDGE 0R SOLID MATTER RECOVERED FROM SEWAGE.

APPLICATION FILED IULY13, l9l4. .mmmmm Patented Apr.13, 11915.

2 SHEETS-SHEET 2.

THE NORRIS PETERS\CO4PHOTO'LITHO .msrncizr; J a

piarrnio smarts ATlEh-l' onirrn' ABRAHAM BUCKLEY OGDEN, OF URMSTGN, MANCHESTER, ENGLAND.

APPARATUS FOR DRYING- THE SLUDGE OB, SOLID MATTER RECOVERED FROM SEWAGE.

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Specification of Letters Patent.

- Patented Apr. 13, 19125.

Application filed July 13, 1914-. Serial No. 850,6?8.

To all whom "it may concern:

Be it known that I, ABRAHAM BUCKLEY ()GDEN, a subject of the King of Great Britain and Ireland, residing at 35 Gloucester road, Urniston, Manchester, in the county of Lancaster, England, have invented new and useful Improvements in or Relating to Apparatus for Drying the Sludge or Solid Matter Recovered from Sewage, of which the following is a specification.

This invention relates to apparatus for drying the sludge or solid'matter recovered from sewage.

The sludge or solid sewage matter recovered from sewage is generally pressed into blocks or cakes to express part of the moisture from it, and these blocks or cakes are afterward dried to remove the whole or the greater part of the remaining moisture and subsequently ground or pulverized for use as a fertilizer or artificial manure.

The object of the present invention is to provide an improved and simple apparatus for the eiiicient drying of the blocks or cakes of sludge or solid sewage matter.

I will fully describe the invention with reference to the accompanying drawings wherein Figure 1 is a longitudinal section of a drying apparatus in accordance therewith. Fig. 2 is a sectional plan of Fig. 1 and Fig. 3 is a transverse section on the line XY in Fig. 2. Fig. 4 is a part enlarged longitudinal section and Fig. 5 a part transverse section more clearly illustrating the construction of the floor on which the sludge or solid matter is dried, and Fig. 6 is a perspective view of one of the metal plates used in the construction of the floor.

Referring to the drawings, a is a drying chamber having a concrete floor b at a suitable distance above which (say from six to nine inches) is a second or false floor 0. The floor 0 may conveniently be composed of metal plates cl (Figs. 4 to 6) resting on girders 6 supported on rows of bricks 7, the bricks being spaced apart so that the spaces between the rows and girders communicate with each other by the intervening spaces 9. The plates all art preferably provided with joggled lips it which lie between the pairs of girders and allow of the plates being riveted or bolted together with their upper surfaces flush with each other. The plates (2 may also be riveted or bolted to the girders e, or they may rest loosely thereon. To the space j between the floors 6 and c steam isat the end a of the chamber a, and provided with one or more branches or nozzles 0 opening between each pair of girders e and rows of bricks 7. By reason of the openings 9 (Figs. 4 and 5) the steam admitted by the branches or nozzles 0 can circulate through the whole of the space j between the floors Z) and c. The floor b has a slight fall toward the opposite end 79 of the chamber a, and openings 9 (Fig. 1) are provided in the end wall to convey the condensation from the space 7' to a conduit 1* which may lead to reservoir .9. The flue t from the furnace of the boiler m is carried across the end n of the chamber a, along the side of same, and across the other end 79 to the chimney stack a, preferably situated at or about the mid dle thereof. Next to the flue t Where it passes across the end a of the chamber a, I provide an air chamber '11 which is'open to the atmosphere by openings to in its walls, and across the flue t T fit above the level of the upper or false floor 0, pipes to so that air from the chamber 41 passes through the pipes 02, thereby becoming heated, and issues into the chamber a. If desired the air may be supplied to the chamber '0 by a fan or blower. At the end p of the chamber a an air outlet or fine 1) leading to the chimney stack u is provided.

The sludge or solid sewage matter to be dried is run into the chamber a on wagons traveling on tracks .2 and is spread on the floor 0, the drying being effected by the heat from the steam admitted to the space j between the floors b and 0 and the hot air issuing into the chamber a through the pipes .21. The dried material is conveyed by elevators 2 to grinding mills 3, which grind or pul- Verize it and deliver it to bins 4C for bagging or removal as required.

The chamber a is preferably divided by one or more partitions 5 into two or more smaller chambers in order that the drying may be continuous, one of said smaller chambers being discharged of its dried material and recharged with material to be dried, while the material in the other chamber or chambers is being dried.

The wagons containing the sludge or sewage matter to be dried may, before being, and while waiting to be, run into the chamber a, be run through, and remain in, the

portion of the flue t which extends along the side of the chamber, and the sludge or sewage matter'thus be subjected to a partial drying before being dried in the chamber a. To this end the side portion of the flue t may be provided with locks 6, fitted with doors 7, and an endless cable or other suitable means will be employed for traveling the wagons through the flue. A second chamber s'ma be provided above the drying' chamber a, which chamber 8 may be adapted, similarly to the chamber a, as a second drying chamber, or' it maybe used ;asa storag'e chamber, orfo'r' other purposes, or be dispensed with. y

Havingthus described myiiivention, what I claim as new and desii"e'tose(':ure by 'Letters Patent is:-

1. In a kiln for apparatus ifor dryingthe sludge or solid sewage matter recovered from sewage, the combination of a drying chamber, a sloping floor in said chamber, a second-or false floor above said sloping floor, a steam pipe extending 'a eross one'e'nd of the space between said fl'oorsand provided with nozzles opening to said space, a condensation collecting conduit at the other end of said space, a furnace flue extending across one end ofsaid drying chamber, an air chamber alongside sa'id'fiue, means 'for ad mitting air tosaid air chamber, and air pipes extending across said flue from said air chamber to' said drying chamber above the second or fal'se' floor therein.

2-. In a kiln orapparatus for drying the sludge or solid sewage matter recovered from sewage, the combination of a drying chamber,a floor in'sa'id chamber, a second or false floor in sald'chamberabove said floor Copies o'f this patent may be obtained for constituted by metal plates supported by rows of spaced bricks, which divide the space between the two floors into inter-communicating passages, and each of said metal plates being provided with a joggled edge to receive the adjacent edge of the next plate, means for admitting steam to said space between the floors, and means for admitting hot air to said chamber above said second or false floor.

3. In a kiln or apparatus for drying the sludge or solid sewage matter recovered from sewage, the combination of a drying chamber, a sloping floor in said chamber, a second or false floor above said sloping door, a steam pipe vextending across one end of the space between said floors and provided with nozzles opening to said space, a condensation collecting conduit at theothfer end of said space, a, furnace flue extending acrossoneend of said drying chamber, an air chamber alongside said flue, means for admittingai'rto said air chamber, air pipes extending across said flue from said air chamber to said dryingcliamber abovesaid second'or false floor, an extension of said flue'extendingalong'one side of the drying chamber, a track in said flue extension for the truck'sconveyingthe material to be dried and ingress and egress locks at the ends of said flue extension.

In testimony whereof I have signed my name 'to' this specification in the presence of two subscribing witnesses.

ABRAHAM BUCKLEY OGDEN.

Witnesses:

EDMUND VARD PATTISON, HAROLD WALKER.

five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

